Title page for etd-0714118-220746


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URN etd-0714118-220746
Author Yi-ting Chuang
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2017
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Studies on Electrolytic Abrasive Polishing of Square Inner Surface of Die Steel Using Conductive Polymer Tool
Date of Defense 2018-07-24
Page Count 113
Keyword
  • Mirror
  • Electrolytic abrasive polishing
  • Die steel
  • Conductive polymer
  • Square hole
  • Abstract In this study, a square shape of conductive polymer (ESD 410C) was employed as a tool electrode to electrolytic abrasive polishing the inner surface of SKD61 steel with the square hole 12 and 8 mm in length using a polishing machine with multi-axis motions. Experiments were carried out to understand effects of the alumina abrasive particle size (3, 1, and 0.3 μm), load (0.3 ~ 0.5 N), current (0 ~ 200 mA) and polishing time (0 ~ 8 min) on the surface roughness of the polished surface.
    In the abrasive polishing under a load of 0.4 N and the abrasive size of 1 μm, the Rmax value decreased from 0.5 μm to 0.26 μm, and the Ra value from 0.11 μm 0.059 μm after 8 minutes. In the electrolytic polishing (no abrasive) under a load of 0.4 N and a current of 60 mA, the Rmax value decreased to 0.29 μm and the Ra value to 0.065 μm after 8 minutes.
    The two-stage electrolytic abrasive polishing was conducted. In the first stage, the Rmax value decreased to 0.23 μm and the Ra value to 0.052 μm under a load of 0.4 N, the abrasive size of 1 μm, a current of 60 mA and the polishing time of 4 minutes. In the second stage, the Rmax value decreased to 0.16 μm and the Ra value to 0.029 μm using the abrasive size of 0.3 μm after 4 minutes. The polished surface achieved a bright and a smooth surface.
    The electrolytic abrasive polishing with feeding was conducted. The Rmax value decreased to 0.17 ~ 0.19 μm and the Ra value to 0.037 ~ 0.041 μm under a load of 0.4 N, the abrasive size of 1 μm, a current of 60 mA and the polishing time of 24 minutes. The inner surface of the workpiece achieved a bright mirror.
    Advisory Committee
  • Li-Ming Chu - chair
  • Yuh-Ping Chang - co-chair
  • Rong-Tsong Lee - advisor
  • Yuang-Cherng Chiou - advisor
  • Files
  • etd-0714118-220746.pdf
  • Indicate in-campus at 5 year and off-campus access at 99 year.
    Date of Submission 2018-08-16

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